Barn and dovecote, Tros-y-marian

This is a linear agricultural range featuring a 3-bay threshing barn at the center, a lower 3-door lofted cowhouse on the left (west) end, and a square-plan dovecote on the right. A single-storey outshut has been added against the front wall of the barn, to the left of the doorway. The structure is built of rubble masonry and has a slate roof with a tiled ridge; however, the dovecote is now roofless and the cowhouse roof is in a ruinous condition.

The barn has opposing doorways, with the southern doorway featuring a stone tablet above it that displays the initials and date W / H A / 1678. There are ventilation slits flanking the doorways, three on each side, with the central slit positioned at a lower level. The dovecote includes external stone stairs leading up to a doorway in the south wall. The rear wall has a single doorway on the left and a partially blocked segmental arch that contains another doorway and a window; the rear gable apex has partially collapsed. The lofted cowhouse opens into the yard to the north and consists of a 3-door range with loft windows set under the eaves.

The interior was not inspected during the survey, but from the rear, it was observed that the dovecote is lined with nesting holes up to the gable apex.